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Industry Article: Fluid Regime Sheds New Light on Formation Damage in Tight Gas Reservoirs

E&P Article: Fluid Regime Sheds New Light on Formation Damage in Tight Gas Reservoirs
Publication: E&P
Volume: 2012
Issue: March
Publication Date: 03/01/2012

Recent laboratory studies investigating production-restricting formation damage provide constructive data that support the acute water-sensitive nature of tight gas reservoirs and the importance of maintaining excellent fluid loss control. This is especially important when water-base drill-in fluids are used. The tests emphasize the importance of pretest preparation of core samples, which was shown to be essential in reducing formation damage in tight reservoirs. Laboratory investigations have confirmed that ultrafine material generated during the preparation of core plugs could propagate artificial fines migration; therefore, strict pretest cleaning procedures are critical to minimize artificial damage. To design drilling fluids that would minimize formation damage potential, it is important to first understand or evaluate the composition, structure, pore system, and deformation of reservoir rocks.


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